twelve story building and look over the edge to the reflecting pool 170 feet below. You drop your book over the edge at the sam

A block is sliding along a frictionless surface at 11.1 m/s.  The block slides down a hill.  At the bottom of the hill, the block is sliding at 36.5 m/s.  How tall (in meters) is the hill?

You and four of your friends are all interested in getting out of town for a break. Two of your friends just want to relax while the other two want to get some exercise. You need some quiet time to study. To satisfy everyone, the group decides to spend the day canoeing on the river. Two people will put a canoe in the river and just drift downstream with the 1.5 km/h current. The second pair will begin at the same time as the first from 10. km downstream. They will paddle upstream until the two canoes meet. Since you have been canoeing with these people before, you know that they can paddle at 4.0 km/h in still water. When the two canoes meet, they will come to shore and you should be there to meet them with the picnic lunch. You decide to go to that spot ahead of time so you can study while you wait for your friends. How far from where the drifters launched will you wait for them? After lunch you decide to paddle across the river, which is 0.50 km wide. You can paddle 3.0 km/h in…

Compressed air is used to fire a 46.0 g ball vertically upward from a 1.8-m-tall tube. The air exerts an upward force of 2.8 N on the ball as long as it is in the tube. How high (in m) does the ball go above the top of the tube, assuming that the acceleration due to gravity is 9.80 m/s2?